5.开尔文的定义及其计量基准国际单位制和我国法定计量单位规定:开尔文(K)是热力学温度单位,它等于水的三相点热力学温度的1/273.16。开尔文是七个基本单位之一,用于表示温度、温度间隔或温差。所谓三相点,就是液体、气体和固体同时存在的状态,由于它存在于各种物质中,因此,应当说清楚所指的物质。在开尔文的定义 5. KELVIN’S DEFINITION AND MEASUREMENTS The International System of Units and our legal units of measurement stipulate that Kelvin (K) is a thermodynamic unit of temperature equal to 1 / 273.16 of the thermodynamic temperature of the triple point of water. Kelvin is one of seven basic units used to indicate temperature, temperature interval, or temperature difference. The so-called three-phase point, that is, liquid, gas and solid coexist state, because it exists in a variety of substances, therefore, should make it clear that the substance. The definition in Kelvin